Abstract
In recent years, the dynamic simulation on HVAC system has become more important for the control of indoor environment and energy conservation. For giving a minute description of control process in HVAC system, it is recommended to simulate the total system including the thermal dynamic characteristics of the elements and subsystems. This paper presents a simulation method that can be used for study on HVAC process dynamics and control tuning by the state transition method in which the time step can be freely selected. In this paper, a constant air volume and single duct system is chosen as the subject of this study. The simulation method presented in this paper gives a simple approach to modeling the control process of an indoor air temperature and the simultaneous control process of the temperature and the humidity in a typical room of the office buildings. As a result of these two kinds of simulations, various characteristics of the indoor air temperature, humidity, comfort and energy consumption in these different control processes are clarified.
